21_Digestive_2

21_Digestive_2 - Small Intestine Lined with simple columnar...

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Small Intestine Lined with simple columnar epithelium Suspended by the messentary proper Functions: Majority of chemical digestion occurs here Bile from liver Digestive enzymes from pancreas Nutrient absorption
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Small Intestine Regions: Duodenum 25 cm (10 inches) Receives main pancreatic duct and bile duct Jejunum 2.5 m (7.5 ft.) Ileum 3.6 m (10.8 ft.)
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Modifications for Absorption All three increase surface area for absorption Circular folds (plicae circulares) Macroscopic Slow the chyme Villi Microscopic Microvilli Microscopic Apical surface of epithelial cells • Brush border
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Hernias Hiatal hernia Stomach pushes through esophageal hiatus Umbilical hernia Intestines push through the rectus abdominis Inguinal hernia Intestines push through inguinal canal More common in males Femoral hernia Intestines push through the femoral triangle More common in females
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Large Intestine Functions: Absorbs water and electrolytes Forces feces toward rectum Special features : 1. Teniae coli 3 longitudinal layers of muscle 1. Haustra Sacks or bulges 1. Epiploic appendages Fat filled pouches of visceral peritoneum
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This note was uploaded on 04/06/2011 for the course PDBIO 220 taught by Professor Tomco during the Winter '09 term at BYU.

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21_Digestive_2 - Small Intestine Lined with simple columnar...

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